The 2019 season started on 1 November. This season the volume that can be caught has been reduced by 20% from the 2018 limit.
The DEFA Minister Geoffrey Boot said the move would help to keep the “important industry” sustainable.
Fishing boats licensed to fish in Manx waters will be restricted to a daily catch of 560kg, down from 700kg in 2018 with the total amount that can be landed during the seven-month season limited to just over 2,000 tonnes.
The measures were recommended by the island’s scallop management board, which includes fishermen and fish processors, based on information collected during last year’s season and an industry survey.
Mr Boot said the new catch limits would allow those in the industry to “help to balance the productivity of the fishery with the protection of stocks from overfishing”.